Panpsychism belongs to metaphysics. Yet, the standard model is also based on metaphysics, but some other kind of metaphysics as compared to panpsychism. The metaphysics of modern physics is made in the 17th century and it did not changed much since that. There is a nice book that describes how the Universe become mathematical in that times:

Edwin Arthur Burtt, The Metaphysical Foundations of Modern Science. A Historical and Critical Essay.

Well, it is rather an old book (the beginning of the 20th century) but it quite nice. It shows how the ideas of Kepler, Galileo, Descartes and others (the book follow the development up to Newton) have completely changed the middle age metaphysics. The secondary qualities have been completely removed from mathematical Nature and this means following.

It nicely describes the consequences of the scientific revolution from that side in terms of neuroscience. What you see around you is the reconstruction of your brain. Hence when an astronomer watches a star, the star that he/she sees is actually in his/her brain.